US1190595A - Rotary valve for explosive-engine. - Google Patents

Description

13.1. SCHOFIELD. ROTARY VALVE FOR EXPLOSIVE ENGINES.

I APPLICATION FILED NOV. l6. I914- 1,190,595.

Patented July 11, 1916.

ooocouu IIVI/EIVPTOR UNITED STATES PATENT OFFICE.

' enonon L. scrrormrn, 'orxn'nsnsorrr, mssounr.

no'rnw vA vr:

To all whom it may concern: I

Be it known that'I, GEORGE L. SoHormLn, a 'citizen'of the United States. residing at Kansas City, in the county of Jackson and State of Missouri, haveinvented certain new and useful Im rovements in Rotary Valves for Explosive ngines; and I do declare the following to'be a-full, clear, and exact description of the invention, such as will enable others skilled in theart-to which it ape pertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to a rotary valve for explosive engines, and has for its principal object to provide a rotary valve wherein the impact occasioned by explosion of gas within an engine cylinder, is balanced to obviate uneven pressure and strain on the'valve and its inclosing parts. In accomplishing this object I have provided the improved details of structure, the prefeiried'embodiment of which is illustrated in the accompanying drawings, wherein Figure I is a perspective viewof an exemplification of an explosive engine in which I my improved valve may be used. Fig. II

is a longitudinal vertical section of the same.

Fig. III is a transverseyertical section on the line III-III of Fig. II. Fig. IV is a detail perspective view 'ofthe rotary valve.

' Fi V is a perspective view ofa retaining- 'col er in the delivery end ofthe valve hous-' ing. Fig. VI is a detail perspective view of the valve balancing cup or thimble.

- Referring more in detail to the parts 1 designates an explosive engine of. an ordinary vertical type and is here shown merely to facilitate the illustration of my improve ments, and with the understanding that the valve may be combined in a horizontal engine, vertical engine, or other types of explosive engines.

The engine 1 comprises a cylinder 2,.

wherein charges of fuel are exploded, and a valve housing 3 comprising mechanism for controlling the passage of fuel to the-cylinder, the compression and ignition of the charge and exhaustion ofthe burnt or spent .gases at properintervals.

The specific construction of the housing" 3' comprises interior-chambers 5 and 6 of Specification of Letters Patent.

, Revolubly mounted FOR EXPLOSIVE-ENGINI.

Patented July 11, 1916.

'ippllcati on filed November 16, 1914. Serial No. 872,389.

different diameter, the large chamber being at the outer end of the housing and having an annular seat 7 on account of the difference in diameter between the two chambers. within the smaller chamber 5 is a rotary valve 9, having a port 11 therein adapted for independent communication with the intake and exhaust ports 12-43, that extend through the housing 3 to the chamber 5 from the respective intake and exhaust conduits l4- 15 that are fed from a suitable carbureter and may deliver through a suitable muflier, not shown; The valve 9 has an integral end 17 that closes its outer end and forms a cup-shaped structure that fits snugly within the chamber 5 to obviate the escape of gas or vapor between the rotating or valve-ring and the inner surface of the housing and obviating of stufling boxes or packing 1 -intake and exhaustports are located adjacent each other, the single balancing port may be located diametrically opposite a point midway between the intake and exhaust ports, so that expansion of gases within the cylinder and explosion chamber may not cause unequal pressure or strain on the rotating valve; the cup 10 also protecting the rotat ng valve 9 from carbon and heat of the explosion. The open end of the cup 10 g has a flared mouth 24 overlying the beveled outer end 25 ofthe valve ring!) and is provided with a flange 26 which overlies the seat 7 in the valve housing and is preferably separated therefrom by a packing ring -26 to better ins'urez'igainst'the leakage of gas through, the joint. i J

The cup 10 is held in place by a retaining collar-'28, which is preferably formed inte gral with a cap 29 ithat may be attached to Y thehousing by bolts 30 and sealsthe valve.

chamber, the sleeve being provided with sockets 31 for receivi g the ends of dowel-" pins 32 that project from thering flange 26. The sleeve 28 is provided with a port 33 through which .the charges of fuel vapor may be delivered from the outer valvechann her into the interior of the cylinder.

A spark plug;- 3+ is preferably arranged diametrically opposite the intake and exhaust ports and in alinement with the balanee port id in the valve. cup,lso that when the sparker is energized to ignitethc charge of fuel. itis ex nised to the interior ofthe valve chambenlmt iscovered by the rotary valve immediately following the ignition,

thereby protecting the. plug from. the oil and heat and thereby preventing the accu mulation of carbon onthe plug.

In order to rotate the valve S) in proper synchronism with the sparking.mechamsm,

I provide a shaft35, which is .revolubly v i i mounted in a. bearing boss do on the end of i 35 projects through its bearin f. \Yith the valve in place the cup is dropped into the valve chamber with its annular flange rest inp, on the packing ring and. the cap with its collar next installed, so that the doweh pins on the valve cup project into the sockets in the inner end of the (EOllil'lZ. With the parts soarranged and opcratively connected with the engine driving mechanism. the valve cup is held against rotation. while rotation of the shaft 3:) will rotate the valve ring, so that communication is established at proper intervals between thexintake and exhaust ports; the operation in this respect being that ol any ordinary explosive engine, except as to the method of securing the communieations by therotary member instead of the usual puppet valves.

With a construction of this character,

were the cup 10 closed except for the in-/ take and exhaust ports, when a charge would he exploded in the cylinder the explosion of each charge would exert apressure through the cup ports against the rotary valve ring which would tend todrive the ring outwardly and thereby exert a retard ing contact of the ring: on the inner-face of the housing. and as the presence of the intake and exhaust ports in alinement with the like ports in. the valve cup wouldatlord no backing for the rotary ring; at such points, there would he a tendency to force the ring to wear out of shape. particularly after repeated explosions. In order, how ever. to balance the pressure on the valve ring, I have provided the balance port in tion with the housing ports, and havin by Letters-Patent, is:

1. A rotary valve comprisinga housing havinginner and outer valve chainbers and provided with intake and exhaust ports and with a spark plug, a rotary sleeve mounted in one of the chambers, and having a port adapted for communication with either of the housing ports and for exposing said plug to the interior of the chamber, a valve cup located within the sleeve and having intake and exhaust ports adapted for communicw an opposite balance port in alinement with the allve port, a sleeve in the other valve chamber having pin and. dowetconnection with the valvecup, means for holding the sleeve against rotation, means for closing the outer end of the second chamber and holding the collar in place, and means for rotating said sleeve.

A rotary valvecomprising a housing having a valve chamber and intake and exhaust ports opening to said chamber, a spark plug exposed to the interior of said chamber, a cup in the chamber spaced from the housing, the said cup having intake and we haust ports adapted for communication with a 100 the intake and exhaust ports in the housing and having a port through which a spark from said plug; may be projected to the interior of the cup and a valve member rota.- tably mounted between the cup andhousing and having a port adapted for passing the intake and exhaust ports and the spark plug 111 proper sequence. l p

A rotary valve comprisingashouldered valve chamber and having intake and exhaust ports opening to said chamber, a cup located in said valve chamber and an end flange seated against the shoulder thereof,

the said cap having separate intake, exhaust l I claim as new therein, and desire to secure and spark ports. and a valve member rotatably mounted between the cup and housing and having a single port adapted for exposing the housing intake and exhaust ports and the spark plop to the proper cup ports in determined sequence.

4. A rotary valve comprising a. housing having. an interior chamber closed at one end and having a shoulder at its opposite end,

the said casing having separate intake and exhaust ports and having a spark plug exposed to its interior. a cup mounted in and spaced from the inner face of said housing, said cup being closed at the closed end of the opposite end. a shoulder on the open end of said cup seated in the housing shoulder, the

housing and having a flaring mouth at its said cup having intake exhaust and: spark tatably mounted in the closed end of the 15 ports in radial aiinement with the housing housing and fixed t0 the valve member.

intake and exhaust ports and with the spark In testimony whereof I affix my signature :plug, a valve member rotatably mounted hein presence of two witnesses.

tween the cup and housing and having a GEORGE L SCHOFIELD' closed end located between the closed end of the housing and the closed end of the cup, \Vitnesses:

and 'having a port adapted for exposing. the LYNN A. ROBINSON, cup ports-in proper sequence and a shaft ro- LETA ,E, COATS.

Images